I am unable to remove a Back to Back from an order, I receive a message “Cannot remove a Back to Back Assignment because Logistic information has been entered for Shipment (shipment #)”. What does this message mean?

Use Release Explorer to check the status of the Sales Order Shipment. Once a shipment has been allocated and released, the Back to Back cannot be removed. If you un-release and un-allocate the shipment, you will be able to successfully remove the back to back